docs: Link fixes such as 301 redirects (#26586)

docs/en/contribute/dev_call.md

@@ -7,7 +7,7 @@ const { site } = useData();
 
 <div v-if="site.title !== 'PX4 Guide (main)'">
   <div class="custom-block danger">
-    <p class="custom-block-title">This page may be out out of date. <a href="https://docs.px4.io/main/en/contribute/dev_call.html">See the latest version</a>.</p>
+    <p class="custom-block-title">This page may be out out of date. <a href="https://docs.px4.io/main/en/contribute/dev_call">See the latest version</a>.</p>
   </div>
 </div>
 
@@ -36,4 +36,4 @@ Please add your topics for discussion to the agenda before the meeting begins, b
 ## Schedule
 
 - TIME: Wednesday 17h00 CET ([subscribe to calendar](https://dronecode.org/calendar/))
-- **Join the call**: [https://discord.gg/BDYmr6FA6Q](https://discord.gg/BDYmr6FA6Q)
+- **Join the call**: [https://discord.com/invite/BDYmr6FA6Q](https://discord.com/invite/BDYmr6FA6Q)

docs/en/contribute/docs.md

@@ -54,7 +54,7 @@ If you already have a clone of the [PX4-Autopilot](https://github.com/PX4/PX4-Au
 To get the library(s) sources onto your local computer you will need to use the git toolchain.
 The instructions below explain how to get git and use it on your local computer.
 
-1. Download git for your computer from [https://git-scm.com/downloads](https://git-scm.com/downloads)
+1. Download git for your computer from [https://git-scm.com/downloads/](https://git-scm.com/downloads/)
 1. [Sign up](https://github.com/signup) for Github if you haven't already
 1. Create a copy (Fork) of the [PX4-Autopilot repo](https://github.com/PX4/PX4-Autopilot) on Github ([instructions here](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/fork-a-repo)).
 1. Clone (copy) your forked repository to your local computer:
@@ -79,7 +79,7 @@ The instructions below explain how to get git and use it on your local computer.
 1. Add a _remote_ called "upstream" to point to the "official" PX4 version of the library:
 
    ```sh
-   git remote add upstream https://github.com/PX4/PX4-Autopilot.git
+   git remote add upstream https://github.com/PX4/PX4-Autopilot
    ```
 
    :::tip

docs/en/contribute/git_examples.md

@@ -20,7 +20,7 @@ Adding a feature to PX4 follows a defined workflow. In order to share your contr
   ```sh
   cd PX4-Autopilot
   git submodule update --init --recursive
-  git remote add upstream https://github.com/PX4/PX4-Autopilot.git
+  git remote add upstream https://github.com/PX4/PX4-Autopilot
   ```
 
 - You should have now two remote repositories: One repository is called `upstream` that points to PX4/PX4-Autopilot, and one repository `origin` that points to your forked copy of the PX4 repository.
@@ -55,7 +55,7 @@ Adding a feature to PX4 follows a defined workflow. In order to share your contr
 
   For a good commit message, please refer to the [Source Code Management](../contribute/code.md#commits-and-commit-messages) section.
 
-- Some time might have passed and the [upstream main](https://github.com/PX4/PX4-Autopilot.git) has changed.
+- Some time might have passed and the [upstream main](https://github.com/PX4/PX4-Autopilot) has changed.
   PX4 prefers a linear commit history and uses [git rebase](https://git-scm.com/book/en/v2/Git-Branching-Rebasing).
   To include the newest changes from upstream in your local branch, switch to your main branch
 
@@ -134,7 +134,7 @@ To get the source code for a _specific older release_ (tag):
 1. Clone the PX4-Autopilot repo and navigate into _PX4-Autopilot_ directory:
 
    ```sh
-   git clone https://github.com/PX4/PX4-Autopilot.git
+   git clone https://github.com/PX4/PX4-Autopilot
    cd PX4-Autopilot
    ```
 
@@ -173,7 +173,7 @@ To get a release branch:
 - Clone the PX4-Autopilot repo and navigate into _PX4-Autopilot_ directory:
 
   ```sh
-  git clone https://github.com/PX4/PX4-Autopilot.git
+  git clone https://github.com/PX4/PX4-Autopilot
   cd PX4-Autopilot
   ```
 

docs/en/contribute/support.md

@@ -7,7 +7,7 @@ const { site } = useData();
 
 <div v-if="site.title !== 'PX4 Guide (main)'">
   <div class="custom-block danger">
-    <p class="custom-block-title">This page may be out out of date. <a href="https://docs.px4.io/main/en/contribute/support.html">See the latest version</a>.</p>
+    <p class="custom-block-title">This page may be out out of date. <a href="https://docs.px4.io/main/en/contribute/support">See the latest version</a>.</p>
   </div>
 </div>
 
@@ -18,7 +18,7 @@ This section shows how you can get help from the core dev team and the wider com
 The core development team and community are active on the following channels:
 
 - [PX4 Discuss Forum](https://discuss.px4.io/) - Post here first!
-- [PX4 Discord](https://discord.gg/dronecode) - Post here if you don't get a response in discuss within a few days (include a link to your forum topic).
+- [PX4 Discord](https://discord.com/invite/dronecode) - Post here if you don't get a response in discuss within a few days (include a link to your forum topic).
 
 :::tip
 The Discuss Forum is much preferred because it is indexed by search engines and serves as a common knowledge base.